./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:11:17,392 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:11:17,449 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:11:17,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:11:17,454 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:11:17,469 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:11:17,470 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:11:17,470 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:11:17,471 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:11:17,471 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:11:17,471 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:11:17,471 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:11:17,472 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:11:17,472 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:11:17,472 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:11:17,473 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:11:17,473 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:11:17,473 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:11:17,474 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:11:17,474 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:11:17,474 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:11:17,477 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:11:17,477 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:11:17,477 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:11:17,478 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:11:17,478 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:11:17,478 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:11:17,478 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:11:17,478 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:11:17,478 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:11:17,479 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:11:17,479 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:11:17,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:11:17,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:11:17,479 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:11:17,479 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:11:17,480 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:11:17,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:11:17,480 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:11:17,481 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:11:17,481 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:11:17,482 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:11:17,482 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2024-10-13 07:11:17,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:11:17,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:11:17,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:11:17,723 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:11:17,723 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:11:17,724 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-10-13 07:11:19,032 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:11:19,191 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:11:19,191 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-10-13 07:11:19,198 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27062ffc7/dbfeaa57bbb3482ea7799e25eb3e71d3/FLAGeaa601e19 [2024-10-13 07:11:19,210 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27062ffc7/dbfeaa57bbb3482ea7799e25eb3e71d3 [2024-10-13 07:11:19,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:11:19,213 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:11:19,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:11:19,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:11:19,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:11:19,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e95b600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19, skipping insertion in model container [2024-10-13 07:11:19,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,246 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:11:19,490 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-10-13 07:11:19,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:11:19,509 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:11:19,527 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-10-13 07:11:19,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:11:19,547 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:11:19,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19 WrapperNode [2024-10-13 07:11:19,547 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:11:19,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:11:19,548 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:11:19,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:11:19,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,589 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 191 [2024-10-13 07:11:19,590 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:11:19,591 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:11:19,591 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:11:19,591 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:11:19,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,607 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,625 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-13 07:11:19,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,626 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,635 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,639 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,640 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,641 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:11:19,644 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:11:19,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:11:19,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:11:19,645 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (1/1) ... [2024-10-13 07:11:19,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:11:19,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:19,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 07:11:19,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 07:11:19,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:11:19,733 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:11:19,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:11:19,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:11:19,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:11:19,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:11:19,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:11:19,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:11:19,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:11:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:11:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:11:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:11:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:11:19,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:11:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:11:19,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:11:19,737 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:11:19,851 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:11:19,853 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:11:20,151 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:11:20,152 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:11:20,458 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:11:20,459 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 07:11:20,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:11:20 BoogieIcfgContainer [2024-10-13 07:11:20,459 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:11:20,461 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:11:20,461 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:11:20,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:11:20,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:11:19" (1/3) ... [2024-10-13 07:11:20,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bfc5cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:11:20, skipping insertion in model container [2024-10-13 07:11:20,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:19" (2/3) ... [2024-10-13 07:11:20,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bfc5cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:11:20, skipping insertion in model container [2024-10-13 07:11:20,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:11:20" (3/3) ... [2024-10-13 07:11:20,475 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-10-13 07:11:20,490 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:11:20,490 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:11:20,491 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:11:20,540 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:11:20,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2024-10-13 07:11:20,598 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-10-13 07:11:20,598 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:11:20,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-10-13 07:11:20,602 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2024-10-13 07:11:20,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 23 transitions, 58 flow [2024-10-13 07:11:20,614 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:11:20,619 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@618603c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:11:20,620 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:11:20,627 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:11:20,628 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2024-10-13 07:11:20,628 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:11:20,628 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:20,629 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:20,629 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:20,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash -917773730, now seen corresponding path program 1 times [2024-10-13 07:11:20,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:20,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132780602] [2024-10-13 07:11:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:20,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:20,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132780602] [2024-10-13 07:11:20,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132780602] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:20,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:20,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:11:20,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464039674] [2024-10-13 07:11:20,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:20,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:11:20,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:20,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:11:20,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:11:20,956 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-13 07:11:20,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:20,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:20,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-13 07:11:20,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:21,093 INFO L124 PetriNetUnfolderBase]: 94/185 cut-off events. [2024-10-13 07:11:21,097 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-13 07:11:21,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 185 events. 94/185 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 598 event pairs, 22 based on Foata normal form. 1/183 useless extension candidates. Maximal degree in co-relation 317. Up to 113 conditions per place. [2024-10-13 07:11:21,102 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 27 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2024-10-13 07:11:21,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 151 flow [2024-10-13 07:11:21,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:11:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:11:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-10-13 07:11:21,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-10-13 07:11:21,114 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 58 flow. Second operand 3 states and 47 transitions. [2024-10-13 07:11:21,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 151 flow [2024-10-13 07:11:21,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:11:21,122 INFO L231 Difference]: Finished difference. Result has 25 places, 25 transitions, 69 flow [2024-10-13 07:11:21,124 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=25, PETRI_TRANSITIONS=25} [2024-10-13 07:11:21,128 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2024-10-13 07:11:21,129 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 25 transitions, 69 flow [2024-10-13 07:11:21,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:21,131 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:21,131 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:21,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:11:21,132 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:21,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:21,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1358368092, now seen corresponding path program 1 times [2024-10-13 07:11:21,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:21,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975348734] [2024-10-13 07:11:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:21,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:21,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:21,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975348734] [2024-10-13 07:11:21,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975348734] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:21,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:21,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:11:21,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121106605] [2024-10-13 07:11:21,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:21,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:11:21,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:21,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:11:21,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:11:21,347 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-13 07:11:21,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:21,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:21,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-13 07:11:21,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:21,523 INFO L124 PetriNetUnfolderBase]: 188/338 cut-off events. [2024-10-13 07:11:21,526 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-13 07:11:21,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 338 events. 188/338 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1342 event pairs, 62 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 197. Up to 187 conditions per place. [2024-10-13 07:11:21,529 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 39 selfloop transitions, 9 changer transitions 1/51 dead transitions. [2024-10-13 07:11:21,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 51 transitions, 240 flow [2024-10-13 07:11:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:11:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:11:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-10-13 07:11:21,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-13 07:11:21,533 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 69 flow. Second operand 5 states and 65 transitions. [2024-10-13 07:11:21,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 51 transitions, 240 flow [2024-10-13 07:11:21,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 51 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:11:21,535 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 124 flow [2024-10-13 07:11:21,536 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2024-10-13 07:11:21,536 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-10-13 07:11:21,536 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 124 flow [2024-10-13 07:11:21,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:21,537 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:21,537 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:21,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:11:21,537 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:21,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1429312728, now seen corresponding path program 2 times [2024-10-13 07:11:21,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:21,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098986086] [2024-10-13 07:11:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:21,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:21,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:21,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098986086] [2024-10-13 07:11:21,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098986086] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:21,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:21,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 07:11:21,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842793380] [2024-10-13 07:11:21,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:21,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:11:21,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:21,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:11:21,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:11:21,706 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-13 07:11:21,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 124 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:21,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:21,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-13 07:11:21,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:21,934 INFO L124 PetriNetUnfolderBase]: 230/424 cut-off events. [2024-10-13 07:11:21,935 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-10-13 07:11:21,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 424 events. 230/424 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1838 event pairs, 30 based on Foata normal form. 13/435 useless extension candidates. Maximal degree in co-relation 567. Up to 122 conditions per place. [2024-10-13 07:11:21,941 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 62 selfloop transitions, 12 changer transitions 1/77 dead transitions. [2024-10-13 07:11:21,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 77 transitions, 437 flow [2024-10-13 07:11:21,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:11:21,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:11:21,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-10-13 07:11:21,943 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2024-10-13 07:11:21,943 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 124 flow. Second operand 7 states and 92 transitions. [2024-10-13 07:11:21,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 77 transitions, 437 flow [2024-10-13 07:11:21,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 77 transitions, 437 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 07:11:21,946 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 212 flow [2024-10-13 07:11:21,946 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-10-13 07:11:21,948 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2024-10-13 07:11:21,948 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 212 flow [2024-10-13 07:11:21,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:21,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:21,948 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:21,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:11:21,949 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:21,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash 469608532, now seen corresponding path program 3 times [2024-10-13 07:11:21,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:21,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371137254] [2024-10-13 07:11:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:21,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:22,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:22,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371137254] [2024-10-13 07:11:22,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371137254] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:22,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:22,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:11:22,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115246850] [2024-10-13 07:11:22,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:22,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:11:22,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:22,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:11:22,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:11:22,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-13 07:11:22,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:22,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:22,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-13 07:11:22,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:22,165 INFO L124 PetriNetUnfolderBase]: 292/535 cut-off events. [2024-10-13 07:11:22,165 INFO L125 PetriNetUnfolderBase]: For 857/857 co-relation queries the response was YES. [2024-10-13 07:11:22,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1835 conditions, 535 events. 292/535 cut-off events. For 857/857 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2346 event pairs, 92 based on Foata normal form. 2/529 useless extension candidates. Maximal degree in co-relation 1351. Up to 262 conditions per place. [2024-10-13 07:11:22,172 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 52 selfloop transitions, 10 changer transitions 4/68 dead transitions. [2024-10-13 07:11:22,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 497 flow [2024-10-13 07:11:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:11:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:11:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-10-13 07:11:22,173 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-10-13 07:11:22,173 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 212 flow. Second operand 5 states and 63 transitions. [2024-10-13 07:11:22,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 497 flow [2024-10-13 07:11:22,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 485 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-13 07:11:22,183 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 259 flow [2024-10-13 07:11:22,183 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-10-13 07:11:22,185 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2024-10-13 07:11:22,185 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 259 flow [2024-10-13 07:11:22,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:22,185 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:22,185 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:22,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 07:11:22,186 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:22,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:22,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1005547373, now seen corresponding path program 1 times [2024-10-13 07:11:22,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:22,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421120264] [2024-10-13 07:11:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:22,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:22,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421120264] [2024-10-13 07:11:22,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421120264] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:22,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:22,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:11:22,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715623861] [2024-10-13 07:11:22,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:22,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:11:22,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:11:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:11:22,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-13 07:11:22,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 259 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:22,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:22,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-13 07:11:22,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:22,425 INFO L124 PetriNetUnfolderBase]: 305/553 cut-off events. [2024-10-13 07:11:22,425 INFO L125 PetriNetUnfolderBase]: For 1229/1233 co-relation queries the response was YES. [2024-10-13 07:11:22,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2039 conditions, 553 events. 305/553 cut-off events. For 1229/1233 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2519 event pairs, 107 based on Foata normal form. 3/549 useless extension candidates. Maximal degree in co-relation 1783. Up to 290 conditions per place. [2024-10-13 07:11:22,428 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 52 selfloop transitions, 7 changer transitions 7/69 dead transitions. [2024-10-13 07:11:22,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 533 flow [2024-10-13 07:11:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:11:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:11:22,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-10-13 07:11:22,430 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2024-10-13 07:11:22,430 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 259 flow. Second operand 5 states and 67 transitions. [2024-10-13 07:11:22,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 533 flow [2024-10-13 07:11:22,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 494 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-10-13 07:11:22,434 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 261 flow [2024-10-13 07:11:22,434 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2024-10-13 07:11:22,435 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 25 predicate places. [2024-10-13 07:11:22,435 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 261 flow [2024-10-13 07:11:22,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:22,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:22,435 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:22,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 07:11:22,436 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:22,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash -710500163, now seen corresponding path program 2 times [2024-10-13 07:11:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:22,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405224791] [2024-10-13 07:11:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:22,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:22,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:22,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405224791] [2024-10-13 07:11:22,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405224791] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:11:22,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892068880] [2024-10-13 07:11:22,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:11:22,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:22,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:22,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:11:22,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:11:22,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:11:22,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:11:22,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 07:11:22,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:22,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:22,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892068880] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:22,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:22,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-10-13 07:11:22,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909455684] [2024-10-13 07:11:22,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:22,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 07:11:22,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:22,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 07:11:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-13 07:11:22,650 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:22,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 261 flow. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:22,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:22,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:22,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:22,966 INFO L124 PetriNetUnfolderBase]: 428/738 cut-off events. [2024-10-13 07:11:22,967 INFO L125 PetriNetUnfolderBase]: For 1900/1900 co-relation queries the response was YES. [2024-10-13 07:11:22,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2730 conditions, 738 events. 428/738 cut-off events. For 1900/1900 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3120 event pairs, 22 based on Foata normal form. 12/748 useless extension candidates. Maximal degree in co-relation 2151. Up to 147 conditions per place. [2024-10-13 07:11:22,974 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 75 selfloop transitions, 52 changer transitions 2/130 dead transitions. [2024-10-13 07:11:22,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 130 transitions, 1038 flow [2024-10-13 07:11:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:11:22,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:11:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2024-10-13 07:11:22,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3708791208791209 [2024-10-13 07:11:22,977 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 261 flow. Second operand 14 states and 135 transitions. [2024-10-13 07:11:22,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 130 transitions, 1038 flow [2024-10-13 07:11:22,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 130 transitions, 981 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-10-13 07:11:22,983 INFO L231 Difference]: Finished difference. Result has 65 places, 79 transitions, 678 flow [2024-10-13 07:11:22,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=678, PETRI_PLACES=65, PETRI_TRANSITIONS=79} [2024-10-13 07:11:22,984 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2024-10-13 07:11:22,984 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 79 transitions, 678 flow [2024-10-13 07:11:22,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:22,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:22,985 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:23,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 07:11:23,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-13 07:11:23,186 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:23,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1226407250, now seen corresponding path program 4 times [2024-10-13 07:11:23,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:23,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720575341] [2024-10-13 07:11:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:23,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:23,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:23,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720575341] [2024-10-13 07:11:23,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720575341] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:23,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:23,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:11:23,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675380721] [2024-10-13 07:11:23,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:23,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:11:23,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:23,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:11:23,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:11:23,296 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:23,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 79 transitions, 678 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:23,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:23,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:23,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:23,398 INFO L124 PetriNetUnfolderBase]: 417/721 cut-off events. [2024-10-13 07:11:23,398 INFO L125 PetriNetUnfolderBase]: For 2403/2403 co-relation queries the response was YES. [2024-10-13 07:11:23,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3007 conditions, 721 events. 417/721 cut-off events. For 2403/2403 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3054 event pairs, 131 based on Foata normal form. 8/727 useless extension candidates. Maximal degree in co-relation 2651. Up to 433 conditions per place. [2024-10-13 07:11:23,403 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 77 selfloop transitions, 27 changer transitions 0/105 dead transitions. [2024-10-13 07:11:23,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 1018 flow [2024-10-13 07:11:23,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:11:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:11:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-10-13 07:11:23,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-10-13 07:11:23,405 INFO L175 Difference]: Start difference. First operand has 65 places, 79 transitions, 678 flow. Second operand 5 states and 64 transitions. [2024-10-13 07:11:23,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 1018 flow [2024-10-13 07:11:23,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 953 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-10-13 07:11:23,414 INFO L231 Difference]: Finished difference. Result has 67 places, 80 transitions, 682 flow [2024-10-13 07:11:23,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=682, PETRI_PLACES=67, PETRI_TRANSITIONS=80} [2024-10-13 07:11:23,416 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2024-10-13 07:11:23,416 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 80 transitions, 682 flow [2024-10-13 07:11:23,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:23,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:23,417 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:23,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 07:11:23,417 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:23,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:23,418 INFO L85 PathProgramCache]: Analyzing trace with hash -641270421, now seen corresponding path program 3 times [2024-10-13 07:11:23,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:23,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317260956] [2024-10-13 07:11:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:23,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:23,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:23,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317260956] [2024-10-13 07:11:23,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317260956] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:23,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:23,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 07:11:23,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638508966] [2024-10-13 07:11:23,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:23,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:11:23,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:23,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:11:23,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:11:23,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:23,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 80 transitions, 682 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:23,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:23,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:23,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:23,675 INFO L124 PetriNetUnfolderBase]: 429/741 cut-off events. [2024-10-13 07:11:23,676 INFO L125 PetriNetUnfolderBase]: For 2543/2543 co-relation queries the response was YES. [2024-10-13 07:11:23,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3128 conditions, 741 events. 429/741 cut-off events. For 2543/2543 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3163 event pairs, 132 based on Foata normal form. 8/747 useless extension candidates. Maximal degree in co-relation 2815. Up to 433 conditions per place. [2024-10-13 07:11:23,681 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 81 selfloop transitions, 34 changer transitions 0/116 dead transitions. [2024-10-13 07:11:23,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 116 transitions, 1106 flow [2024-10-13 07:11:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:11:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:11:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2024-10-13 07:11:23,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-10-13 07:11:23,683 INFO L175 Difference]: Start difference. First operand has 67 places, 80 transitions, 682 flow. Second operand 6 states and 73 transitions. [2024-10-13 07:11:23,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 116 transitions, 1106 flow [2024-10-13 07:11:23,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 116 transitions, 1034 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:11:23,708 INFO L231 Difference]: Finished difference. Result has 69 places, 83 transitions, 723 flow [2024-10-13 07:11:23,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=69, PETRI_TRANSITIONS=83} [2024-10-13 07:11:23,708 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 43 predicate places. [2024-10-13 07:11:23,709 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 83 transitions, 723 flow [2024-10-13 07:11:23,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:23,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:23,709 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:23,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 07:11:23,709 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:23,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:23,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1589498937, now seen corresponding path program 4 times [2024-10-13 07:11:23,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:23,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108941246] [2024-10-13 07:11:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:23,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:23,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:23,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108941246] [2024-10-13 07:11:23,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108941246] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:23,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:23,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:11:23,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608380780] [2024-10-13 07:11:23,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:23,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:11:23,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:11:23,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:11:23,789 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-13 07:11:23,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 83 transitions, 723 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:23,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:23,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-13 07:11:23,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:23,912 INFO L124 PetriNetUnfolderBase]: 383/686 cut-off events. [2024-10-13 07:11:23,913 INFO L125 PetriNetUnfolderBase]: For 2408/2426 co-relation queries the response was YES. [2024-10-13 07:11:23,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2941 conditions, 686 events. 383/686 cut-off events. For 2408/2426 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3081 event pairs, 113 based on Foata normal form. 3/679 useless extension candidates. Maximal degree in co-relation 2553. Up to 394 conditions per place. [2024-10-13 07:11:23,917 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 63 selfloop transitions, 23 changer transitions 4/108 dead transitions. [2024-10-13 07:11:23,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 108 transitions, 1042 flow [2024-10-13 07:11:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:11:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:11:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-10-13 07:11:23,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-10-13 07:11:23,919 INFO L175 Difference]: Start difference. First operand has 69 places, 83 transitions, 723 flow. Second operand 5 states and 63 transitions. [2024-10-13 07:11:23,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 108 transitions, 1042 flow [2024-10-13 07:11:23,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 994 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 07:11:23,927 INFO L231 Difference]: Finished difference. Result has 71 places, 82 transitions, 714 flow [2024-10-13 07:11:23,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=714, PETRI_PLACES=71, PETRI_TRANSITIONS=82} [2024-10-13 07:11:23,928 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 45 predicate places. [2024-10-13 07:11:23,928 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 82 transitions, 714 flow [2024-10-13 07:11:23,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:23,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:23,928 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:23,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 07:11:23,929 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:23,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1656258960, now seen corresponding path program 5 times [2024-10-13 07:11:23,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:23,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482309310] [2024-10-13 07:11:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:23,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:24,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:24,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482309310] [2024-10-13 07:11:24,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482309310] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:24,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:24,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 07:11:24,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389527133] [2024-10-13 07:11:24,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:24,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:11:24,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:11:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:11:24,006 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:24,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 82 transitions, 714 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:24,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:24,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:24,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:24,186 INFO L124 PetriNetUnfolderBase]: 492/849 cut-off events. [2024-10-13 07:11:24,186 INFO L125 PetriNetUnfolderBase]: For 2706/2706 co-relation queries the response was YES. [2024-10-13 07:11:24,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3606 conditions, 849 events. 492/849 cut-off events. For 2706/2706 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3784 event pairs, 129 based on Foata normal form. 9/856 useless extension candidates. Maximal degree in co-relation 3116. Up to 439 conditions per place. [2024-10-13 07:11:24,193 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 90 selfloop transitions, 30 changer transitions 0/121 dead transitions. [2024-10-13 07:11:24,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 121 transitions, 1183 flow [2024-10-13 07:11:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:11:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:11:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-10-13 07:11:24,194 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-10-13 07:11:24,194 INFO L175 Difference]: Start difference. First operand has 71 places, 82 transitions, 714 flow. Second operand 6 states and 74 transitions. [2024-10-13 07:11:24,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 121 transitions, 1183 flow [2024-10-13 07:11:24,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 121 transitions, 1127 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-13 07:11:24,202 INFO L231 Difference]: Finished difference. Result has 72 places, 86 transitions, 779 flow [2024-10-13 07:11:24,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=72, PETRI_TRANSITIONS=86} [2024-10-13 07:11:24,204 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2024-10-13 07:11:24,204 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 86 transitions, 779 flow [2024-10-13 07:11:24,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:24,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:24,204 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:24,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 07:11:24,205 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:24,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:24,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1210490047, now seen corresponding path program 5 times [2024-10-13 07:11:24,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:24,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885891559] [2024-10-13 07:11:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:24,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:24,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:24,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885891559] [2024-10-13 07:11:24,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885891559] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:24,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:24,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:11:24,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638097566] [2024-10-13 07:11:24,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:24,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:11:24,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:24,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:11:24,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:11:24,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-13 07:11:24,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 86 transitions, 779 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:24,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:24,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-13 07:11:24,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:24,416 INFO L124 PetriNetUnfolderBase]: 433/779 cut-off events. [2024-10-13 07:11:24,417 INFO L125 PetriNetUnfolderBase]: For 3021/3045 co-relation queries the response was YES. [2024-10-13 07:11:24,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3340 conditions, 779 events. 433/779 cut-off events. For 3021/3045 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3641 event pairs, 137 based on Foata normal form. 3/773 useless extension candidates. Maximal degree in co-relation 2867. Up to 412 conditions per place. [2024-10-13 07:11:24,422 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 60 selfloop transitions, 30 changer transitions 1/109 dead transitions. [2024-10-13 07:11:24,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 1116 flow [2024-10-13 07:11:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:11:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:11:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-10-13 07:11:24,423 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-13 07:11:24,423 INFO L175 Difference]: Start difference. First operand has 72 places, 86 transitions, 779 flow. Second operand 5 states and 65 transitions. [2024-10-13 07:11:24,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 1116 flow [2024-10-13 07:11:24,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 109 transitions, 1057 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-13 07:11:24,430 INFO L231 Difference]: Finished difference. Result has 74 places, 92 transitions, 876 flow [2024-10-13 07:11:24,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=876, PETRI_PLACES=74, PETRI_TRANSITIONS=92} [2024-10-13 07:11:24,430 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-10-13 07:11:24,431 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 92 transitions, 876 flow [2024-10-13 07:11:24,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:24,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:24,431 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:24,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-13 07:11:24,431 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:24,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:24,432 INFO L85 PathProgramCache]: Analyzing trace with hash -111148459, now seen corresponding path program 6 times [2024-10-13 07:11:24,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:24,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064777940] [2024-10-13 07:11:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:24,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:24,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:24,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064777940] [2024-10-13 07:11:24,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064777940] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:24,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:24,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 07:11:24,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441963598] [2024-10-13 07:11:24,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:24,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:11:24,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:24,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:11:24,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:11:24,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:24,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 92 transitions, 876 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:24,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:24,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:24,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:24,648 INFO L124 PetriNetUnfolderBase]: 506/874 cut-off events. [2024-10-13 07:11:24,648 INFO L125 PetriNetUnfolderBase]: For 3156/3156 co-relation queries the response was YES. [2024-10-13 07:11:24,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3703 conditions, 874 events. 506/874 cut-off events. For 3156/3156 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3922 event pairs, 140 based on Foata normal form. 16/888 useless extension candidates. Maximal degree in co-relation 3445. Up to 411 conditions per place. [2024-10-13 07:11:24,654 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 80 selfloop transitions, 35 changer transitions 2/118 dead transitions. [2024-10-13 07:11:24,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 118 transitions, 1232 flow [2024-10-13 07:11:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:11:24,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:11:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2024-10-13 07:11:24,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-10-13 07:11:24,655 INFO L175 Difference]: Start difference. First operand has 74 places, 92 transitions, 876 flow. Second operand 6 states and 76 transitions. [2024-10-13 07:11:24,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 118 transitions, 1232 flow [2024-10-13 07:11:24,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 118 transitions, 1185 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-10-13 07:11:24,665 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 921 flow [2024-10-13 07:11:24,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=921, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-10-13 07:11:24,666 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2024-10-13 07:11:24,667 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 921 flow [2024-10-13 07:11:24,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:24,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:24,667 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:24,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 07:11:24,668 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:24,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:24,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2077923714, now seen corresponding path program 6 times [2024-10-13 07:11:24,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:24,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677812852] [2024-10-13 07:11:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:24,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:24,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:24,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677812852] [2024-10-13 07:11:24,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677812852] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:24,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:24,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:11:24,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105761155] [2024-10-13 07:11:24,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:24,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:11:24,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:24,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:11:24,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:11:24,746 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 26 [2024-10-13 07:11:24,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 921 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:24,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:24,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 26 [2024-10-13 07:11:24,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:24,871 INFO L124 PetriNetUnfolderBase]: 416/749 cut-off events. [2024-10-13 07:11:24,872 INFO L125 PetriNetUnfolderBase]: For 2955/2967 co-relation queries the response was YES. [2024-10-13 07:11:24,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 749 events. 416/749 cut-off events. For 2955/2967 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3510 event pairs, 128 based on Foata normal form. 2/743 useless extension candidates. Maximal degree in co-relation 3056. Up to 399 conditions per place. [2024-10-13 07:11:24,877 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 70 selfloop transitions, 27 changer transitions 2/106 dead transitions. [2024-10-13 07:11:24,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 1160 flow [2024-10-13 07:11:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:11:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:11:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-10-13 07:11:24,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-10-13 07:11:24,878 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 921 flow. Second operand 5 states and 60 transitions. [2024-10-13 07:11:24,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 1160 flow [2024-10-13 07:11:24,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 106 transitions, 1067 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-10-13 07:11:24,885 INFO L231 Difference]: Finished difference. Result has 74 places, 93 transitions, 874 flow [2024-10-13 07:11:24,886 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=874, PETRI_PLACES=74, PETRI_TRANSITIONS=93} [2024-10-13 07:11:24,886 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-10-13 07:11:24,886 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 93 transitions, 874 flow [2024-10-13 07:11:24,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:24,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:24,887 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:24,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 07:11:24,887 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:24,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:24,887 INFO L85 PathProgramCache]: Analyzing trace with hash 201793112, now seen corresponding path program 7 times [2024-10-13 07:11:24,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:24,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442658916] [2024-10-13 07:11:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:24,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:11:24,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:24,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442658916] [2024-10-13 07:11:24,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442658916] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:24,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:24,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 07:11:24,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644626765] [2024-10-13 07:11:24,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:24,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:11:24,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:24,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:11:24,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:11:24,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:24,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 93 transitions, 874 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:24,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:24,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:24,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:25,102 INFO L124 PetriNetUnfolderBase]: 483/821 cut-off events. [2024-10-13 07:11:25,102 INFO L125 PetriNetUnfolderBase]: For 2944/2944 co-relation queries the response was YES. [2024-10-13 07:11:25,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 821 events. 483/821 cut-off events. For 2944/2944 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3565 event pairs, 145 based on Foata normal form. 9/828 useless extension candidates. Maximal degree in co-relation 2844. Up to 457 conditions per place. [2024-10-13 07:11:25,107 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 81 selfloop transitions, 31 changer transitions 1/114 dead transitions. [2024-10-13 07:11:25,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 114 transitions, 1180 flow [2024-10-13 07:11:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:11:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:11:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-10-13 07:11:25,108 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-10-13 07:11:25,108 INFO L175 Difference]: Start difference. First operand has 74 places, 93 transitions, 874 flow. Second operand 6 states and 70 transitions. [2024-10-13 07:11:25,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 114 transitions, 1180 flow [2024-10-13 07:11:25,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 114 transitions, 1126 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-13 07:11:25,114 INFO L231 Difference]: Finished difference. Result has 75 places, 93 transitions, 880 flow [2024-10-13 07:11:25,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=880, PETRI_PLACES=75, PETRI_TRANSITIONS=93} [2024-10-13 07:11:25,115 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2024-10-13 07:11:25,115 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 93 transitions, 880 flow [2024-10-13 07:11:25,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:25,115 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:25,115 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:25,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 07:11:25,116 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:25,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:25,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1913229141, now seen corresponding path program 1 times [2024-10-13 07:11:25,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:25,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191168252] [2024-10-13 07:11:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:25,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:11:25,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:25,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191168252] [2024-10-13 07:11:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191168252] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:25,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:25,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:11:25,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180727275] [2024-10-13 07:11:25,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:25,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:11:25,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:25,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:11:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:11:25,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-13 07:11:25,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 93 transitions, 880 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:25,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:25,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-13 07:11:25,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:25,292 INFO L124 PetriNetUnfolderBase]: 365/717 cut-off events. [2024-10-13 07:11:25,293 INFO L125 PetriNetUnfolderBase]: For 3103/3133 co-relation queries the response was YES. [2024-10-13 07:11:25,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 717 events. 365/717 cut-off events. For 3103/3133 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3595 event pairs, 162 based on Foata normal form. 25/732 useless extension candidates. Maximal degree in co-relation 2559. Up to 558 conditions per place. [2024-10-13 07:11:25,297 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 66 selfloop transitions, 2 changer transitions 15/109 dead transitions. [2024-10-13 07:11:25,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 1160 flow [2024-10-13 07:11:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:11:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:11:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-10-13 07:11:25,299 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-10-13 07:11:25,299 INFO L175 Difference]: Start difference. First operand has 75 places, 93 transitions, 880 flow. Second operand 5 states and 59 transitions. [2024-10-13 07:11:25,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 1160 flow [2024-10-13 07:11:25,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 1090 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-13 07:11:25,307 INFO L231 Difference]: Finished difference. Result has 77 places, 94 transitions, 841 flow [2024-10-13 07:11:25,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=77, PETRI_TRANSITIONS=94} [2024-10-13 07:11:25,308 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2024-10-13 07:11:25,308 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 94 transitions, 841 flow [2024-10-13 07:11:25,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:25,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:25,308 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:25,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-13 07:11:25,308 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:25,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:25,309 INFO L85 PathProgramCache]: Analyzing trace with hash -447768941, now seen corresponding path program 1 times [2024-10-13 07:11:25,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:25,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044211383] [2024-10-13 07:11:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:25,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:11:25,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:25,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044211383] [2024-10-13 07:11:25,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044211383] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:11:25,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:11:25,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:11:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388935602] [2024-10-13 07:11:25,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:11:25,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:11:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:11:25,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:11:25,386 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-13 07:11:25,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 94 transitions, 841 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:25,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:25,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-13 07:11:25,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:25,481 INFO L124 PetriNetUnfolderBase]: 363/714 cut-off events. [2024-10-13 07:11:25,481 INFO L125 PetriNetUnfolderBase]: For 2596/2638 co-relation queries the response was YES. [2024-10-13 07:11:25,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2929 conditions, 714 events. 363/714 cut-off events. For 2596/2638 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3571 event pairs, 162 based on Foata normal form. 25/731 useless extension candidates. Maximal degree in co-relation 2897. Up to 559 conditions per place. [2024-10-13 07:11:25,486 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 67 selfloop transitions, 2 changer transitions 11/106 dead transitions. [2024-10-13 07:11:25,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 1100 flow [2024-10-13 07:11:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:11:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:11:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2024-10-13 07:11:25,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-10-13 07:11:25,487 INFO L175 Difference]: Start difference. First operand has 77 places, 94 transitions, 841 flow. Second operand 4 states and 50 transitions. [2024-10-13 07:11:25,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 1100 flow [2024-10-13 07:11:25,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 1084 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-10-13 07:11:25,493 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 845 flow [2024-10-13 07:11:25,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=845, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2024-10-13 07:11:25,495 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2024-10-13 07:11:25,495 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 845 flow [2024-10-13 07:11:25,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:25,496 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:25,496 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:25,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-13 07:11:25,496 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:25,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2092765735, now seen corresponding path program 1 times [2024-10-13 07:11:25,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:25,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959141685] [2024-10-13 07:11:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:25,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:11:25,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959141685] [2024-10-13 07:11:25,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959141685] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:11:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160396557] [2024-10-13 07:11:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:25,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:25,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:25,733 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:11:25,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:11:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:25,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 07:11:25,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:11:25,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:25,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2024-10-13 07:11:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:11:25,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160396557] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:25,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:25,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-10-13 07:11:25,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508584975] [2024-10-13 07:11:25,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:25,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 07:11:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 07:11:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-13 07:11:25,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-13 07:11:25,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 845 flow. Second operand has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:25,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:25,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-13 07:11:25,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:26,266 INFO L124 PetriNetUnfolderBase]: 1072/1996 cut-off events. [2024-10-13 07:11:26,267 INFO L125 PetriNetUnfolderBase]: For 6743/6893 co-relation queries the response was YES. [2024-10-13 07:11:26,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7923 conditions, 1996 events. 1072/1996 cut-off events. For 6743/6893 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12018 event pairs, 143 based on Foata normal form. 54/2044 useless extension candidates. Maximal degree in co-relation 6496. Up to 521 conditions per place. [2024-10-13 07:11:26,318 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 225 selfloop transitions, 14 changer transitions 4/269 dead transitions. [2024-10-13 07:11:26,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 269 transitions, 2858 flow [2024-10-13 07:11:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:11:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:11:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-10-13 07:11:26,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-10-13 07:11:26,319 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 845 flow. Second operand 9 states and 125 transitions. [2024-10-13 07:11:26,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 269 transitions, 2858 flow [2024-10-13 07:11:26,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 269 transitions, 2842 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-13 07:11:26,333 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 954 flow [2024-10-13 07:11:26,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=954, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2024-10-13 07:11:26,334 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 60 predicate places. [2024-10-13 07:11:26,334 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 954 flow [2024-10-13 07:11:26,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:26,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:26,335 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:26,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 07:11:26,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 07:11:26,536 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:26,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:26,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1625193775, now seen corresponding path program 2 times [2024-10-13 07:11:26,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:26,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211957977] [2024-10-13 07:11:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:26,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:11:26,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:26,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211957977] [2024-10-13 07:11:26,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211957977] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:11:26,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157027413] [2024-10-13 07:11:26,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:11:26,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:26,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:26,744 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:11:26,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:11:26,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:11:26,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:11:26,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 07:11:26,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:11:26,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:26,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2024-10-13 07:11:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:11:26,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157027413] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:26,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:26,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-10-13 07:11:26,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414847928] [2024-10-13 07:11:26,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:26,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 07:11:26,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 07:11:26,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-13 07:11:26,920 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-10-13 07:11:26,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 954 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:26,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:26,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-10-13 07:11:26,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:27,525 INFO L124 PetriNetUnfolderBase]: 2651/4950 cut-off events. [2024-10-13 07:11:27,525 INFO L125 PetriNetUnfolderBase]: For 18161/18453 co-relation queries the response was YES. [2024-10-13 07:11:27,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20662 conditions, 4950 events. 2651/4950 cut-off events. For 18161/18453 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35324 event pairs, 405 based on Foata normal form. 167/5109 useless extension candidates. Maximal degree in co-relation 15779. Up to 1606 conditions per place. [2024-10-13 07:11:27,557 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 224 selfloop transitions, 23 changer transitions 18/291 dead transitions. [2024-10-13 07:11:27,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 291 transitions, 3114 flow [2024-10-13 07:11:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 07:11:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 07:11:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-10-13 07:11:27,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-10-13 07:11:27,558 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 954 flow. Second operand 8 states and 114 transitions. [2024-10-13 07:11:27,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 291 transitions, 3114 flow [2024-10-13 07:11:27,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 291 transitions, 3066 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-10-13 07:11:27,591 INFO L231 Difference]: Finished difference. Result has 97 places, 126 transitions, 1142 flow [2024-10-13 07:11:27,592 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=97, PETRI_TRANSITIONS=126} [2024-10-13 07:11:27,592 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2024-10-13 07:11:27,593 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 126 transitions, 1142 flow [2024-10-13 07:11:27,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:27,593 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:27,593 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:27,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:11:27,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 07:11:27,795 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:27,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1808361791, now seen corresponding path program 3 times [2024-10-13 07:11:27,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:27,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521269661] [2024-10-13 07:11:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:27,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:27,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:27,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521269661] [2024-10-13 07:11:27,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521269661] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:11:27,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115307220] [2024-10-13 07:11:27,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:11:27,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:27,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:11:27,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:11:27,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:11:27,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:11:27,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:11:27,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:28,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:28,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115307220] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:28,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:28,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-13 07:11:28,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129922559] [2024-10-13 07:11:28,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:28,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 07:11:28,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 07:11:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:11:28,118 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:28,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 126 transitions, 1142 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:28,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:28,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:28,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:29,416 INFO L124 PetriNetUnfolderBase]: 4834/8047 cut-off events. [2024-10-13 07:11:29,417 INFO L125 PetriNetUnfolderBase]: For 23630/23630 co-relation queries the response was YES. [2024-10-13 07:11:29,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33461 conditions, 8047 events. 4834/8047 cut-off events. For 23630/23630 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 52076 event pairs, 183 based on Foata normal form. 240/8287 useless extension candidates. Maximal degree in co-relation 28087. Up to 1475 conditions per place. [2024-10-13 07:11:29,462 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 373 selfloop transitions, 123 changer transitions 8/505 dead transitions. [2024-10-13 07:11:29,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 505 transitions, 4865 flow [2024-10-13 07:11:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 07:11:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-13 07:11:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 287 transitions. [2024-10-13 07:11:29,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3806366047745358 [2024-10-13 07:11:29,464 INFO L175 Difference]: Start difference. First operand has 97 places, 126 transitions, 1142 flow. Second operand 29 states and 287 transitions. [2024-10-13 07:11:29,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 505 transitions, 4865 flow [2024-10-13 07:11:29,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 505 transitions, 4814 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-10-13 07:11:29,518 INFO L231 Difference]: Finished difference. Result has 144 places, 204 transitions, 2209 flow [2024-10-13 07:11:29,518 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2209, PETRI_PLACES=144, PETRI_TRANSITIONS=204} [2024-10-13 07:11:29,519 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 118 predicate places. [2024-10-13 07:11:29,519 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 204 transitions, 2209 flow [2024-10-13 07:11:29,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:29,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:29,519 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:29,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 07:11:29,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:29,720 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:29,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:29,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1935508487, now seen corresponding path program 4 times [2024-10-13 07:11:29,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:29,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792076864] [2024-10-13 07:11:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:29,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:29,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:29,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792076864] [2024-10-13 07:11:29,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792076864] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:11:29,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379455353] [2024-10-13 07:11:29,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:11:29,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:29,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:29,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:11:29,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 07:11:29,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:11:29,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:11:29,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:11:29,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:29,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:29,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379455353] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:29,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:29,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-13 07:11:29,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826370117] [2024-10-13 07:11:29,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:29,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 07:11:29,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:29,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 07:11:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-13 07:11:29,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:29,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 204 transitions, 2209 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:29,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:29,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:29,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:31,676 INFO L124 PetriNetUnfolderBase]: 6736/11196 cut-off events. [2024-10-13 07:11:31,676 INFO L125 PetriNetUnfolderBase]: For 73665/73665 co-relation queries the response was YES. [2024-10-13 07:11:31,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58582 conditions, 11196 events. 6736/11196 cut-off events. For 73665/73665 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 75443 event pairs, 336 based on Foata normal form. 81/11277 useless extension candidates. Maximal degree in co-relation 56948. Up to 2360 conditions per place. [2024-10-13 07:11:31,782 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 270 selfloop transitions, 178 changer transitions 9/458 dead transitions. [2024-10-13 07:11:31,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 458 transitions, 5315 flow [2024-10-13 07:11:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 07:11:31,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-13 07:11:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 152 transitions. [2024-10-13 07:11:31,784 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38974358974358975 [2024-10-13 07:11:31,784 INFO L175 Difference]: Start difference. First operand has 144 places, 204 transitions, 2209 flow. Second operand 15 states and 152 transitions. [2024-10-13 07:11:31,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 458 transitions, 5315 flow [2024-10-13 07:11:32,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 458 transitions, 5035 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-10-13 07:11:32,313 INFO L231 Difference]: Finished difference. Result has 161 places, 284 transitions, 3400 flow [2024-10-13 07:11:32,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3400, PETRI_PLACES=161, PETRI_TRANSITIONS=284} [2024-10-13 07:11:32,314 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 135 predicate places. [2024-10-13 07:11:32,314 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 284 transitions, 3400 flow [2024-10-13 07:11:32,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:32,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:32,314 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:32,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 07:11:32,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:32,515 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:32,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1473023666, now seen corresponding path program 5 times [2024-10-13 07:11:32,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:32,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54556683] [2024-10-13 07:11:32,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:32,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:32,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:32,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54556683] [2024-10-13 07:11:32,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54556683] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:11:32,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033546519] [2024-10-13 07:11:32,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:11:32,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:32,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:32,599 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:11:32,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 07:11:32,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:11:32,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:11:32,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:11:32,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:32,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:32,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033546519] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:32,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:32,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-13 07:11:32,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241663564] [2024-10-13 07:11:32,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:32,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 07:11:32,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 07:11:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-13 07:11:32,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:32,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 284 transitions, 3400 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:32,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:32,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:32,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:34,471 INFO L124 PetriNetUnfolderBase]: 7479/12457 cut-off events. [2024-10-13 07:11:34,471 INFO L125 PetriNetUnfolderBase]: For 111224/111224 co-relation queries the response was YES. [2024-10-13 07:11:34,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70728 conditions, 12457 events. 7479/12457 cut-off events. For 111224/111224 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 85664 event pairs, 1940 based on Foata normal form. 9/12466 useless extension candidates. Maximal degree in co-relation 68873. Up to 7773 conditions per place. [2024-10-13 07:11:34,578 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 335 selfloop transitions, 45 changer transitions 17/398 dead transitions. [2024-10-13 07:11:34,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 398 transitions, 5262 flow [2024-10-13 07:11:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:11:34,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:11:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-10-13 07:11:34,580 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-10-13 07:11:34,580 INFO L175 Difference]: Start difference. First operand has 161 places, 284 transitions, 3400 flow. Second operand 7 states and 86 transitions. [2024-10-13 07:11:34,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 398 transitions, 5262 flow [2024-10-13 07:11:35,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 398 transitions, 5160 flow, removed 51 selfloop flow, removed 0 redundant places. [2024-10-13 07:11:35,635 INFO L231 Difference]: Finished difference. Result has 170 places, 293 transitions, 3531 flow [2024-10-13 07:11:35,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3531, PETRI_PLACES=170, PETRI_TRANSITIONS=293} [2024-10-13 07:11:35,636 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2024-10-13 07:11:35,636 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 293 transitions, 3531 flow [2024-10-13 07:11:35,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:35,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:35,636 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:35,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 07:11:35,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:35,837 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:35,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:35,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1388022526, now seen corresponding path program 6 times [2024-10-13 07:11:35,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:35,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082209376] [2024-10-13 07:11:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:35,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:35,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:35,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082209376] [2024-10-13 07:11:35,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082209376] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:11:35,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000441276] [2024-10-13 07:11:35,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:11:35,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:35,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:35,937 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:11:35,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 07:11:36,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:11:36,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:11:36,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:11:36,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:36,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:36,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000441276] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:36,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:36,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-13 07:11:36,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539901920] [2024-10-13 07:11:36,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:36,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 07:11:36,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:36,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 07:11:36,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-13 07:11:36,136 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:36,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 293 transitions, 3531 flow. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:36,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:36,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:36,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:38,860 INFO L124 PetriNetUnfolderBase]: 9297/15237 cut-off events. [2024-10-13 07:11:38,860 INFO L125 PetriNetUnfolderBase]: For 140757/140757 co-relation queries the response was YES. [2024-10-13 07:11:38,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87972 conditions, 15237 events. 9297/15237 cut-off events. For 140757/140757 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 105516 event pairs, 1198 based on Foata normal form. 166/15403 useless extension candidates. Maximal degree in co-relation 87256. Up to 5286 conditions per place. [2024-10-13 07:11:39,001 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 490 selfloop transitions, 166 changer transitions 3/660 dead transitions. [2024-10-13 07:11:39,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 660 transitions, 8193 flow [2024-10-13 07:11:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 07:11:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-13 07:11:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 230 transitions. [2024-10-13 07:11:39,003 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4020979020979021 [2024-10-13 07:11:39,003 INFO L175 Difference]: Start difference. First operand has 170 places, 293 transitions, 3531 flow. Second operand 22 states and 230 transitions. [2024-10-13 07:11:39,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 660 transitions, 8193 flow [2024-10-13 07:11:40,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 660 transitions, 8098 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-10-13 07:11:40,207 INFO L231 Difference]: Finished difference. Result has 196 places, 366 transitions, 5156 flow [2024-10-13 07:11:40,208 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5156, PETRI_PLACES=196, PETRI_TRANSITIONS=366} [2024-10-13 07:11:40,208 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 170 predicate places. [2024-10-13 07:11:40,208 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 366 transitions, 5156 flow [2024-10-13 07:11:40,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:40,208 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:40,209 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:40,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 07:11:40,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:40,413 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:40,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:40,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1312729564, now seen corresponding path program 7 times [2024-10-13 07:11:40,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:40,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358709256] [2024-10-13 07:11:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:40,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:40,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:40,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358709256] [2024-10-13 07:11:40,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358709256] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:11:40,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310218355] [2024-10-13 07:11:40,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:11:40,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:40,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:40,515 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:11:40,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 07:11:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:40,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:11:40,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:40,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:40,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310218355] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:40,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:40,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-13 07:11:40,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113179415] [2024-10-13 07:11:40,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:40,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:11:40,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:40,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:11:40,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:11:40,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:40,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 366 transitions, 5156 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:40,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:40,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:40,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:43,296 INFO L124 PetriNetUnfolderBase]: 9369/15390 cut-off events. [2024-10-13 07:11:43,296 INFO L125 PetriNetUnfolderBase]: For 182273/182273 co-relation queries the response was YES. [2024-10-13 07:11:43,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97996 conditions, 15390 events. 9369/15390 cut-off events. For 182273/182273 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 107153 event pairs, 2488 based on Foata normal form. 30/15420 useless extension candidates. Maximal degree in co-relation 97230. Up to 10466 conditions per place. [2024-10-13 07:11:43,461 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 423 selfloop transitions, 77 changer transitions 16/517 dead transitions. [2024-10-13 07:11:43,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 517 transitions, 7425 flow [2024-10-13 07:11:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:11:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:11:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-10-13 07:11:43,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43006993006993005 [2024-10-13 07:11:43,462 INFO L175 Difference]: Start difference. First operand has 196 places, 366 transitions, 5156 flow. Second operand 11 states and 123 transitions. [2024-10-13 07:11:43,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 517 transitions, 7425 flow [2024-10-13 07:11:45,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 517 transitions, 6779 flow, removed 230 selfloop flow, removed 7 redundant places. [2024-10-13 07:11:45,733 INFO L231 Difference]: Finished difference. Result has 202 places, 360 transitions, 4605 flow [2024-10-13 07:11:45,733 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4512, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4605, PETRI_PLACES=202, PETRI_TRANSITIONS=360} [2024-10-13 07:11:45,734 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 176 predicate places. [2024-10-13 07:11:45,734 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 360 transitions, 4605 flow [2024-10-13 07:11:45,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:45,734 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:45,734 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:45,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-13 07:11:45,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-13 07:11:45,935 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:45,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1629265695, now seen corresponding path program 8 times [2024-10-13 07:11:45,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:45,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007889561] [2024-10-13 07:11:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:46,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:46,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007889561] [2024-10-13 07:11:46,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007889561] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:11:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872926464] [2024-10-13 07:11:46,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:11:46,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:46,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:46,042 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:11:46,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 07:11:46,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:11:46,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:11:46,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:11:46,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:46,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:46,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872926464] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:46,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:46,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-13 07:11:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041744968] [2024-10-13 07:11:46,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:46,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:11:46,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:11:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:11:46,262 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:46,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 360 transitions, 4605 flow. Second operand has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 13 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:46,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:46,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:46,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:49,477 INFO L124 PetriNetUnfolderBase]: 11627/19115 cut-off events. [2024-10-13 07:11:49,477 INFO L125 PetriNetUnfolderBase]: For 174211/174211 co-relation queries the response was YES. [2024-10-13 07:11:49,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111290 conditions, 19115 events. 11627/19115 cut-off events. For 174211/174211 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 136677 event pairs, 502 based on Foata normal form. 226/19341 useless extension candidates. Maximal degree in co-relation 110546. Up to 5896 conditions per place. [2024-10-13 07:11:49,687 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 362 selfloop transitions, 275 changer transitions 6/644 dead transitions. [2024-10-13 07:11:49,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 644 transitions, 8532 flow [2024-10-13 07:11:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 07:11:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-13 07:11:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 168 transitions. [2024-10-13 07:11:49,688 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-10-13 07:11:49,688 INFO L175 Difference]: Start difference. First operand has 202 places, 360 transitions, 4605 flow. Second operand 16 states and 168 transitions. [2024-10-13 07:11:49,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 644 transitions, 8532 flow [2024-10-13 07:11:51,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 644 transitions, 8247 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-10-13 07:11:51,561 INFO L231 Difference]: Finished difference. Result has 219 places, 444 transitions, 6397 flow [2024-10-13 07:11:51,561 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6397, PETRI_PLACES=219, PETRI_TRANSITIONS=444} [2024-10-13 07:11:51,562 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 193 predicate places. [2024-10-13 07:11:51,562 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 444 transitions, 6397 flow [2024-10-13 07:11:51,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 13 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:51,562 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:51,562 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:51,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 07:11:51,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-13 07:11:51,763 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:51,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1085553406, now seen corresponding path program 9 times [2024-10-13 07:11:51,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:51,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93514527] [2024-10-13 07:11:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:51,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:51,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:51,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93514527] [2024-10-13 07:11:51,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93514527] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:11:51,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973742671] [2024-10-13 07:11:51,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:11:51,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:51,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:51,838 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:11:51,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 07:11:51,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:11:51,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:11:51,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:11:51,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:51,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:52,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973742671] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:52,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:52,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-13 07:11:52,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711325140] [2024-10-13 07:11:52,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:52,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 07:11:52,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:52,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 07:11:52,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-13 07:11:52,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:52,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 444 transitions, 6397 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:52,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:52,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:52,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:11:55,609 INFO L124 PetriNetUnfolderBase]: 11599/19072 cut-off events. [2024-10-13 07:11:55,610 INFO L125 PetriNetUnfolderBase]: For 241007/241007 co-relation queries the response was YES. [2024-10-13 07:11:55,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123859 conditions, 19072 events. 11599/19072 cut-off events. For 241007/241007 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 136699 event pairs, 2905 based on Foata normal form. 51/19123 useless extension candidates. Maximal degree in co-relation 123095. Up to 11654 conditions per place. [2024-10-13 07:11:55,837 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 525 selfloop transitions, 107 changer transitions 4/637 dead transitions. [2024-10-13 07:11:55,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 637 transitions, 9331 flow [2024-10-13 07:11:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 07:11:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 07:11:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-10-13 07:11:55,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4391025641025641 [2024-10-13 07:11:55,838 INFO L175 Difference]: Start difference. First operand has 219 places, 444 transitions, 6397 flow. Second operand 12 states and 137 transitions. [2024-10-13 07:11:55,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 637 transitions, 9331 flow [2024-10-13 07:11:59,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 637 transitions, 9188 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-10-13 07:11:59,062 INFO L231 Difference]: Finished difference. Result has 223 places, 440 transitions, 6446 flow [2024-10-13 07:11:59,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6446, PETRI_PLACES=223, PETRI_TRANSITIONS=440} [2024-10-13 07:11:59,063 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 197 predicate places. [2024-10-13 07:11:59,063 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 440 transitions, 6446 flow [2024-10-13 07:11:59,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:59,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:11:59,063 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:11:59,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 07:11:59,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-13 07:11:59,267 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:11:59,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:11:59,268 INFO L85 PathProgramCache]: Analyzing trace with hash 49892430, now seen corresponding path program 10 times [2024-10-13 07:11:59,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:11:59,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743460519] [2024-10-13 07:11:59,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:11:59,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:11:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:11:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:59,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:11:59,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743460519] [2024-10-13 07:11:59,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743460519] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:11:59,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217422704] [2024-10-13 07:11:59,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:11:59,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:11:59,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:11:59,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:11:59,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 07:11:59,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:11:59,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:11:59,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:11:59,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:11:59,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 07:11:59,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217422704] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:59,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:59,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-10-13 07:11:59,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503439463] [2024-10-13 07:11:59,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:59,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:11:59,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:11:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:11:59,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:11:59,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 440 transitions, 6446 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:11:59,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:59,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:11:59,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:12:03,479 INFO L124 PetriNetUnfolderBase]: 12893/21080 cut-off events. [2024-10-13 07:12:03,479 INFO L125 PetriNetUnfolderBase]: For 288914/288914 co-relation queries the response was YES. [2024-10-13 07:12:03,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140470 conditions, 21080 events. 12893/21080 cut-off events. For 288914/288914 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 151572 event pairs, 1397 based on Foata normal form. 66/21146 useless extension candidates. Maximal degree in co-relation 139701. Up to 13052 conditions per place. [2024-10-13 07:12:03,732 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 564 selfloop transitions, 122 changer transitions 10/697 dead transitions. [2024-10-13 07:12:03,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 697 transitions, 10275 flow [2024-10-13 07:12:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:12:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:12:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 160 transitions. [2024-10-13 07:12:03,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-10-13 07:12:03,734 INFO L175 Difference]: Start difference. First operand has 223 places, 440 transitions, 6446 flow. Second operand 14 states and 160 transitions. [2024-10-13 07:12:03,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 697 transitions, 10275 flow [2024-10-13 07:12:07,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 697 transitions, 9994 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-10-13 07:12:07,985 INFO L231 Difference]: Finished difference. Result has 230 places, 468 transitions, 7043 flow [2024-10-13 07:12:07,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6189, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7043, PETRI_PLACES=230, PETRI_TRANSITIONS=468} [2024-10-13 07:12:07,986 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 204 predicate places. [2024-10-13 07:12:07,986 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 468 transitions, 7043 flow [2024-10-13 07:12:07,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:07,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:12:07,986 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:12:07,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 07:12:08,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-13 07:12:08,187 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:12:08,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:12:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash -213240680, now seen corresponding path program 11 times [2024-10-13 07:12:08,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:12:08,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093120797] [2024-10-13 07:12:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:12:08,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:12:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:12:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:12:08,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:12:08,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093120797] [2024-10-13 07:12:08,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093120797] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:12:08,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901222408] [2024-10-13 07:12:08,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:12:08,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:12:08,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:12:08,272 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:12:08,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 07:12:08,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:12:08,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:12:08,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:12:08,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:12:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:12:08,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:12:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 07:12:08,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901222408] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:12:08,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:12:08,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-10-13 07:12:08,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204085929] [2024-10-13 07:12:08,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:12:08,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:12:08,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:12:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:12:08,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:12:08,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:12:08,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 468 transitions, 7043 flow. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:08,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:12:08,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:12:08,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:12:12,836 INFO L124 PetriNetUnfolderBase]: 13075/21372 cut-off events. [2024-10-13 07:12:12,836 INFO L125 PetriNetUnfolderBase]: For 297415/297415 co-relation queries the response was YES. [2024-10-13 07:12:13,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143852 conditions, 21372 events. 13075/21372 cut-off events. For 297415/297415 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 154227 event pairs, 545 based on Foata normal form. 116/21488 useless extension candidates. Maximal degree in co-relation 143084. Up to 6612 conditions per place. [2024-10-13 07:12:13,105 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 570 selfloop transitions, 246 changer transitions 4/821 dead transitions. [2024-10-13 07:12:13,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 821 transitions, 11918 flow [2024-10-13 07:12:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 07:12:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-13 07:12:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 254 transitions. [2024-10-13 07:12:13,107 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3757396449704142 [2024-10-13 07:12:13,107 INFO L175 Difference]: Start difference. First operand has 230 places, 468 transitions, 7043 flow. Second operand 26 states and 254 transitions. [2024-10-13 07:12:13,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 821 transitions, 11918 flow [2024-10-13 07:12:17,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 821 transitions, 11655 flow, removed 127 selfloop flow, removed 1 redundant places. [2024-10-13 07:12:17,479 INFO L231 Difference]: Finished difference. Result has 264 places, 501 transitions, 7950 flow [2024-10-13 07:12:17,480 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6782, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7950, PETRI_PLACES=264, PETRI_TRANSITIONS=501} [2024-10-13 07:12:17,480 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 238 predicate places. [2024-10-13 07:12:17,480 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 501 transitions, 7950 flow [2024-10-13 07:12:17,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:17,480 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:12:17,480 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:12:17,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-13 07:12:17,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-13 07:12:17,681 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:12:17,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:12:17,686 INFO L85 PathProgramCache]: Analyzing trace with hash 543451522, now seen corresponding path program 12 times [2024-10-13 07:12:17,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:12:17,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751718526] [2024-10-13 07:12:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:12:17,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:12:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:12:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:12:17,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:12:17,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751718526] [2024-10-13 07:12:17,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751718526] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:12:17,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601631723] [2024-10-13 07:12:17,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:12:17,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:12:17,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:12:17,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:12:17,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 07:12:17,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:12:17,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:12:17,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:12:17,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:12:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:12:17,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:12:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:12:17,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601631723] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:12:17,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:12:17,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-13 07:12:17,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593742732] [2024-10-13 07:12:17,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:12:17,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 07:12:17,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:12:17,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 07:12:17,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:12:17,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:12:17,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 501 transitions, 7950 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:17,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:12:17,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:12:17,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:12:23,141 INFO L124 PetriNetUnfolderBase]: 15105/24590 cut-off events. [2024-10-13 07:12:23,141 INFO L125 PetriNetUnfolderBase]: For 343365/343365 co-relation queries the response was YES. [2024-10-13 07:12:23,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172409 conditions, 24590 events. 15105/24590 cut-off events. For 343365/343365 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 180150 event pairs, 670 based on Foata normal form. 92/24682 useless extension candidates. Maximal degree in co-relation 171601. Up to 7718 conditions per place. [2024-10-13 07:12:23,597 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 592 selfloop transitions, 297 changer transitions 8/898 dead transitions. [2024-10-13 07:12:23,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 898 transitions, 13804 flow [2024-10-13 07:12:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 07:12:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-13 07:12:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 275 transitions. [2024-10-13 07:12:23,599 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3647214854111406 [2024-10-13 07:12:23,599 INFO L175 Difference]: Start difference. First operand has 264 places, 501 transitions, 7950 flow. Second operand 29 states and 275 transitions. [2024-10-13 07:12:23,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 898 transitions, 13804 flow [2024-10-13 07:12:28,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 898 transitions, 13341 flow, removed 128 selfloop flow, removed 10 redundant places. [2024-10-13 07:12:28,869 INFO L231 Difference]: Finished difference. Result has 291 places, 571 transitions, 9582 flow [2024-10-13 07:12:28,870 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7664, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9582, PETRI_PLACES=291, PETRI_TRANSITIONS=571} [2024-10-13 07:12:28,870 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 265 predicate places. [2024-10-13 07:12:28,870 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 571 transitions, 9582 flow [2024-10-13 07:12:28,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:28,871 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:12:28,871 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:12:28,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 07:12:29,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-13 07:12:29,071 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:12:29,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:12:29,072 INFO L85 PathProgramCache]: Analyzing trace with hash -618134438, now seen corresponding path program 13 times [2024-10-13 07:12:29,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:12:29,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402583094] [2024-10-13 07:12:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:12:29,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:12:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:12:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:12:29,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:12:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402583094] [2024-10-13 07:12:29,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402583094] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:12:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546148581] [2024-10-13 07:12:29,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:12:29,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:12:29,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:12:29,217 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:12:29,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 07:12:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:12:29,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:12:29,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:12:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:12:29,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:12:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:12:29,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546148581] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:12:29,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:12:29,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-13 07:12:29,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132246662] [2024-10-13 07:12:29,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:12:29,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 07:12:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:12:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 07:12:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:12:29,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-10-13 07:12:29,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 571 transitions, 9582 flow. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:12:29,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:12:29,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-10-13 07:12:29,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand